Kousa Dogwood looking bad
We think this is scorch damage from periods during the season that were hot and without rain. Drought can cause such a reaction. Kousas have shallow root systems.
It is not concerning this late in the season, and it is common for leaves to look somewhat ravaged after a long season anyway. They will drop soon.
If we go through a period of dry, droughty weather next year, we recommend supplemental water.